A boy complains of bleeding gums, swollen, joints with hemorrhage into joints His paternal and maternal uncle complains of same problem It is due to deficiency of factor________________?

A boy complains of bleeding gums, swollen, joints with hemorrhage into

1.	A boy complains of bleeding gums, swollen, joints with hemorrhage into joints His paternal and maternal uncle complains of same problem It is due to deficiency of factor________________?
A.	VIII
B.	IX
C.	X
D.	VI
Answer» B. IX